The next evolution in wireless networking holds promises of self-driving cars and movies that download in the blink of an eye. 5G is big at this year's Mobile World Congress, but don't expect it until 2020.

Headphones that plug into the the Lightning port of your iPhone, iPad or iPod and draw power from it are due to hit the market soon. Here's a preview of the JBL Reflect Aware, the Philips Fidelio M2L and the Fidelio NC1L.